EP1473144B1 - Method for making an article of footwear - Google Patents
Method for making an article of footwear Download PDFInfo
- Publication number
- EP1473144B1 EP1473144B1 EP03252584A EP03252584A EP1473144B1 EP 1473144 B1 EP1473144 B1 EP 1473144B1 EP 03252584 A EP03252584 A EP 03252584A EP 03252584 A EP03252584 A EP 03252584A EP 1473144 B1 EP1473144 B1 EP 1473144B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- thermoplastic skin
- base wall
- peripheral edge
- skin
- thermoplastic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D35/00—Producing footwear
- B29D35/06—Producing footwear having soles or heels formed and joined on to preformed uppers using a moulding technique, e.g. by injection moulding, pressing and vulcanising
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B1/00—Footwear characterised by the material
- A43B1/0063—Footwear characterised by the material made at least partially of material that can be recycled
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B9/00—Footwear characterised by the assembling of the individual parts
- A43B9/16—Footwear with soles moulded on to uppers or welded on to uppers without adhesive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D35/00—Producing footwear
- B29D35/06—Producing footwear having soles or heels formed and joined on to preformed uppers using a moulding technique, e.g. by injection moulding, pressing and vulcanising
- B29D35/08—Producing footwear having soles or heels formed and joined on to preformed uppers using a moulding technique, e.g. by injection moulding, pressing and vulcanising having multilayered parts
- B29D35/085—Producing footwear having soles or heels formed and joined on to preformed uppers using a moulding technique, e.g. by injection moulding, pressing and vulcanising having multilayered parts by compression moulding, vulcanising or the like
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
Definitions
- This invention relates to a method for making an article of footwear, more particularly to a method for making an article of footwear that has an outsole including a thermoplastic skin and a filler pad surrounded by and bonded to the thermoplastic skin.
- a conventional method for making an article of footwear normally involves thermal molding of an assembly of an upper, an insole or a midsole, and an outsole in a mold such that the midsole or the outsole is softened during the molding operation for bonding to the upper.
- the conventional method is disadvantageous in that the time required for softening the midsole or the outsole is relatively long by virtue of the relatively large thickness of the midsole or the outsole.
- GB-A-826 378 shows such a method.
- the object of the present invention is to provide a method for making an article of footwear that is capable of overcoming the aforementioned drawback.
- a method for making an article of footwear comprises the steps of: preparing an upper that has a bottom peripheral edge; preparing a thermoplastic skin that has a base wall and a peripheral wall which extends from a periphery of the base wall in a transverse direction relative to the base wall and which confines an inner space therein, the peripheral wall having a shape that conforms to that of the bottom peripheral edge of the upper; preparing a filler pad that has a shape conforming to that of the base wall; mounting the upper on a last; preheating the thermoplastic skin to a softened state; and thermal molding the softened thermoplastic skin together with an assembly of the filler pad and the upper in a mold in such a manner that the peripheral wall of the thermoplastic skin is patterned and is bonded to the bottom peripheral edge of the upper and that the filler pad is fittingly received in the inner space and is bonded to the base wall and the peripheral wall of the thermoplastic skin.
- Fig. 1 is a block diagram showing consecutive steps of the first preferred embodiment of a method of this invention for making an article of footwear.
- the method includes the steps of: preparing an upper 10 that has a bottom peripheral edge 12 confining a bottom opening 14; applying an adhesive to a peripheral wall of the upper 10; binding an insole 13 to the bottom peripheral edge 12 of the upper 10; preparing a thermoplastic skin 22 that has a base wall 221 and a peripheral wall 222 which extends from a periphery of the base wall 221 in a transverse direction relative to the base wall 221 and which confines an inner space 223 therein, the peripheral wall 222 having a shape that conforms to that of the bottom peripheral edge 12 of the upper 10 ; preparing a filler pad 21 that has a shape conforming to that of the base wall 221; mounting the upper 10 on a last 30; attaching a tape 40 on the peripheral wall of the upper 10 above the bottom peripheral edge 12 of the upper 10 for preventing formation of flash on the peripheral wall of the upper 10; preheating the thermoplastic skin 22 to a softened state; thermal molding the softened thermoplastic skin 22 together with an
- the thermoplastic skin 22 is preferably made from ethylene vinylacetate copolymer or thermoplastic urethane.
- the filler pad 21 can be made from plastic waste, such as polyurethane, ethylene vinylacetate copolymer, or rubber.
- Fig. 3 illustrates the structure of the filler pad 21 that includes a heel portion 24 and a toe portion 23 which are made from different materials that differ in elasticity.
- a wear-resistant pad 70 can be attached to a bottom surface of the base wall 221 of the thermoplastic skin 22 in the mold 100 during the molding operation.
- Fig. 5 is a block diagram showing consecutive steps of the second preferred embodiment of the method of this invention.
- a positioning block 111 is placed in the inner space 223 in the thermoplastic skin 22 during the molding operation, and is removed from the mold 100 after the molding operation for insertion of the filler pad 21 through the bottom opening 14 into the inner space 223.
- the insole 13 is subsequently laid on an upper surface of the filler pad 21 and is connected to the bottom peripheral edge 12 of the upper 10 after the molding operation according to the method of this embodiment.
- Figs. 7 and 8 illustrate the structure of the thermoplastic skin 22 that further includes a plurality of reinforcing ribs 224 formed on and projecting from the base wall 221 into the inner space 223.
- the filler pad 21 is formed with a plurality of grooves 211 for fittingly receiving the reinforcing ribs 224 so as to enhance the strength of the outsole 20.
- Fig. 9 illustrates the third preferred embodiment of the method of this invention.
- the bottom peripheral edge 12 of the upper 10 extends to the base wall 221 of the thermoplastic skin 22, and the positioning block 111 is laid on the bottom peripheral edge 12 of the upper 10 and the base wall 221 of the thermoplastic skin 22.
- a wear-resistant pad can be attached to the bottom surface of the base wall 221 of the thermoplastic skin 22.
- the outsole 20 of the article of footwear is divided into the thermoplastic skin 22 and the filler pad 21, and since the thermoplastic skin 22 is relatively thin as compared to the filler pad 21 and is the only one that is required to be preheated prior to the molding operation, the manufacturing time of the article of footwear can be reduced as compared to the aforementioned conventional method of the prior art.
- the filler pad 21 made from plastic waste is advantageous and offers much benefit to the reduction of plastic waste.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Description
- This invention relates to a method for making an article of footwear, more particularly to a method for making an article of footwear that has an outsole including a thermoplastic skin and a filler pad surrounded by and bonded to the thermoplastic skin.
- A conventional method for making an article of footwear normally involves thermal molding of an assembly of an upper, an insole or a midsole, and an outsole in a mold such that the midsole or the outsole is softened during the molding operation for bonding to the upper. The conventional method is disadvantageous in that the time required for softening the midsole or the outsole is relatively long by virtue of the relatively large thickness of the midsole or the outsole. GB-A-826 378 shows such a method.
- Therefore, the object of the present invention is to provide a method for making an article of footwear that is capable of overcoming the aforementioned drawback.
- According to the present invention, there is provided a method for making an article of footwear. The method comprises the steps of: preparing an upper that has a bottom peripheral edge; preparing a thermoplastic skin that has a base wall and a peripheral wall which extends from a periphery of the base wall in a transverse direction relative to the base wall and which confines an inner space therein, the peripheral wall having a shape that conforms to that of the bottom peripheral edge of the upper; preparing a filler pad that has a shape conforming to that of the base wall; mounting the upper on a last; preheating the thermoplastic skin to a softened state; and thermal molding the softened thermoplastic skin together with an assembly of the filler pad and the upper in a mold in such a manner that the peripheral wall of the thermoplastic skin is patterned and is bonded to the bottom peripheral edge of the upper and that the filler pad is fittingly received in the inner space and is bonded to the base wall and the peripheral wall of the thermoplastic skin.
- In the drawings which illustrate embodiments of the invention,
- Fig. 1 is a block diagram illustrating consecutive steps of the first preferred embodiment of a method according to this invention for making an article of footwear;
- Fig. 2 is a sectional view to illustrate how a filler pad is enclosed in a space between an upper and a skin of the article of footwear according to the first preferred embodiment of this invention;
- Fig. 3 is a sectional view showing the filler pad of Fig. 2, which is made from two different materials;
- Fig. 4 is a sectional view showing a wear-resistant pad, which is attached to a bottom of the skin of Fig. 2;
- Fig. 5 is a block diagram illustrating consecutive steps of the second preferred embodiment of the method according to this invention;
- Fig. 6 is a sectional view to illustrate how the skin is connected to the upper of the article of footwear according to the second preferred embodiment of this invention;
- Fig. 7 is a sectional side view showing an article of footwear, which is modified from that of Fig. 6, and which includes reinforcing ribs formed on the skin;
- Fig. 8 is a sectional bottom view showing the reinforcing ribs of Fig. 7; and
- Fig. 9 is a sectional view to illustrate how the skin is connected to the upper of the article of footwear according to the third preferred embodiment of this invention.
-
- For the sake of brevity, like elements are denoted by the same reference numerals throughout the disclosure.
- Fig. 1 is a block diagram showing consecutive steps of the first preferred embodiment of a method of this invention for making an article of footwear.
- With reference to Fig. 2, the method includes the steps of: preparing an upper 10 that has a bottom
peripheral edge 12 confining abottom opening 14; applying an adhesive to a peripheral wall of the upper 10; binding aninsole 13 to the bottomperipheral edge 12 of the upper 10; preparing athermoplastic skin 22 that has abase wall 221 and aperipheral wall 222 which extends from a periphery of thebase wall 221 in a transverse direction relative to thebase wall 221 and which confines aninner space 223 therein, theperipheral wall 222 having a shape that conforms to that of the bottomperipheral edge 12 of the upper 10 ; preparing afiller pad 21 that has a shape conforming to that of thebase wall 221; mounting the upper 10 on a last 30; attaching atape 40 on the peripheral wall of the upper 10 above the bottomperipheral edge 12 of the upper 10 for preventing formation of flash on the peripheral wall of the upper 10; preheating thethermoplastic skin 22 to a softened state; thermal molding the softenedthermoplastic skin 22 together with an assembly of thefiller pad 21, theinsole 13, the upper 10 and thetape 40 in amold 100 in such a manner that theperipheral wall 222 of thethermoplastic skin 22 is patterned and is bonded to the bottomperipheral edge 12 of the upper 10 and that thefiller pad 21 is fittingly received in theinner space 223 and is bonded to thebase wall 221 and theperipheral wall 222 of thethermoplastic skin 22 so as to cooperate with thethermoplastic skin 22 to form anoutsole 20 of the article of footwear; cooling themold 100; removing the resultant article of footwear from themold 100; trimming the article of footwear; and removing thetape 40 from the article of footwear. The preheating operation of thethermoplastic skin 22 can be carried out in themold 100 so as to reduce the manufacturing time. - The
thermoplastic skin 22 is preferably made from ethylene vinylacetate copolymer or thermoplastic urethane. Thefiller pad 21 can be made from plastic waste, such as polyurethane, ethylene vinylacetate copolymer, or rubber. Fig. 3 illustrates the structure of thefiller pad 21 that includes aheel portion 24 and atoe portion 23 which are made from different materials that differ in elasticity. - With reference to Fig. 4, a wear-
resistant pad 70 can be attached to a bottom surface of thebase wall 221 of thethermoplastic skin 22 in themold 100 during the molding operation. - Fig. 5 is a block diagram showing consecutive steps of the second preferred embodiment of the method of this invention. With reference to Fig. 6, unlike the method of the previous embodiment, a
positioning block 111 is placed in theinner space 223 in thethermoplastic skin 22 during the molding operation, and is removed from themold 100 after the molding operation for insertion of thefiller pad 21 through the bottom opening 14 into theinner space 223. Theinsole 13 is subsequently laid on an upper surface of thefiller pad 21 and is connected to the bottomperipheral edge 12 of the upper 10 after the molding operation according to the method of this embodiment. - Figs. 7 and 8 illustrate the structure of the
thermoplastic skin 22 that further includes a plurality of reinforcingribs 224 formed on and projecting from thebase wall 221 into theinner space 223. Thefiller pad 21 is formed with a plurality ofgrooves 211 for fittingly receiving the reinforcingribs 224 so as to enhance the strength of theoutsole 20. - Fig. 9 illustrates the third preferred embodiment of the method of this invention. Unlike the second preferred embodiment, the bottom
peripheral edge 12 of the upper 10 extends to thebase wall 221 of thethermoplastic skin 22, and thepositioning block 111 is laid on the bottomperipheral edge 12 of the upper 10 and thebase wall 221 of thethermoplastic skin 22. Similar to the previous embodiment, a wear-resistant pad can be attached to the bottom surface of thebase wall 221 of thethermoplastic skin 22. - Since the
outsole 20 of the article of footwear is divided into thethermoplastic skin 22 and thefiller pad 21, and since thethermoplastic skin 22 is relatively thin as compared to thefiller pad 21 and is the only one that is required to be preheated prior to the molding operation, the manufacturing time of the article of footwear can be reduced as compared to the aforementioned conventional method of the prior art. In addition, thefiller pad 21 made from plastic waste is advantageous and offers much benefit to the reduction of plastic waste.
Claims (11)
- A method for making an article of footwear, comprising the steps of:preparing an upper (10) that has a bottom peripheral edge (12);preparing a thermoplastic skin (22) that has a base wall (221) and a peripheral wall (222) which extends from a periphery of said base wall (221) in a transverse direction relative to said base wall (221) and which confines an inner space (223) therein, said peripheral wall (222) having a shape that conforms to that of said bottom peripheral edge (12) of said upper (10);preparing a filler pad (21) that has a shape conforming to that of said base wall (221);mounting said upper (10) on a last (30);preheating said thermoplastic skin (22) to a softened state; andthermal molding said softened thermoplastic skin (22) together with an assembly of said filler pad (21) and said upper (10) in a mold (100) in such a manner that said peripheral wall (222) of said thermoplastic skin (22) is patterned and is bonded to said bottom peripheral edge (12) of said upper (10) and that said filler pad (21) is fittingly received in said inner space (223) and is bonded to said base wall (221) and said peripheral wall (222) of said thermoplastic skin (22).
- The method of Claim 1, wherein said thermoplastic skin (22) is made from ethylene vinylacetate copolymer.
- The method of Claim 1, wherein said thermoplastic skin (22) is made from thermoplastic polyurethane.
- The method of Claim 1, wherein said filler pad (21) is made from plastic waste.
- The method of Claim 1, further comprising attaching a wear-resistant pad (70) to a bottom surface of said base wall (221) in said mold (100) during the molding operation.
- The method of Claim 1, further comprising binding an insole (13) to said bottom peripheral edge (12) of said upper (10) prior to the molding operation.
- A method for making an article of footwear, comprising the steps of:preparing an upper (10) that has a bottom peripheral edge (12) which confines a bottom opening (14);preparing a thermoplastic skin (22) that has a base wall (221) and a peripheral wall (222) which extends from a periphery of said base wall (221) in a transverse direction relative to said base wall (221) and which confines an inner space (223) therein, said peripheral wall (222) having a shape that conforms to that of said bottom peripheral edge (12) of said upper (10);preparing a filler pad (21) that has a shape conforming to that of said base wall (221);mounting said upper (10) on a last (30);preheating said thermoplastic skin (22) to a softened state;thermal molding said softened thermoplastic skin (22) together with said upper (10) in a mold (100) in such a manner that said peripheral wall (222) of said thermoplastic skin (22) is patterned and is bonded to said bottom peripheral edge (12) of said upper (10);cooling said mold (100) and removing an assembly of said upper (10) and said skin (22) from said mold (100); andinserting fittingly said filler pad (21) in said inner space (223) through said bottom opening (14) in said upper (10).
- The method of Claim 7, wherein said thermoplastic skin (22) is made from ethylene vinylacetate copolymer.
- The method of Claim 7, wherein said thermoplastic skin (22) is made from thermoplastic polyurethane.
- The method of Claim 7, wherein said filler pad (21) is made from plastic waste.
- The method of Claim 7, further comprising laying an insole (13) on an upper surface of said filler pad (21), and connecting said insole (13) to said bottom peripheral edge (12) of said upper (10) after the molding operation.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60301331T DE60301331T2 (en) | 2003-04-24 | 2003-04-24 | Production process of a footwear |
EP03252584A EP1473144B1 (en) | 2003-04-24 | 2003-04-24 | Method for making an article of footwear |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03252584A EP1473144B1 (en) | 2003-04-24 | 2003-04-24 | Method for making an article of footwear |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1473144A1 EP1473144A1 (en) | 2004-11-03 |
EP1473144B1 true EP1473144B1 (en) | 2005-08-17 |
Family
ID=32981947
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03252584A Expired - Lifetime EP1473144B1 (en) | 2003-04-24 | 2003-04-24 | Method for making an article of footwear |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1473144B1 (en) |
DE (1) | DE60301331T2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2616576C2 (en) * | 2014-12-05 | 2017-04-17 | Общество с ограниченной ответственностью "Промкомплектация" | Method of manufacturing polyurethane soles with an overlay of noncellular rubber, polyurethane outsole with non-porous rubber lining of non-porous rubber for soles of polyurethane and a method of its manufacture |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB473611A (en) * | 1935-04-15 | 1937-10-15 | Romika Schuhfabrik Ag | Improvements in and relating to rubber soled footwear |
GB659052A (en) * | 1946-04-05 | 1951-10-17 | Vol Crepe Ltd | Improvements in the manufacture of footwear |
GB826378A (en) * | 1956-05-04 | 1960-01-06 | John Lewis | Improvements in or relating to footwear |
DE2318521A1 (en) * | 1973-04-12 | 1974-10-31 | Funck Kg Dr Ing | METHOD FOR MANUFACTURING UPHOLSTERY SHOES AND LASTINGS FOR CARRYING OUT THE METHOD |
NL9400268A (en) * | 1994-02-22 | 1995-10-02 | Ellen De Vries | Support sole as well as a method and device for manufacturing a support sole. |
-
2003
- 2003-04-24 EP EP03252584A patent/EP1473144B1/en not_active Expired - Lifetime
- 2003-04-24 DE DE60301331T patent/DE60301331T2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP1473144A1 (en) | 2004-11-03 |
DE60301331T2 (en) | 2006-05-24 |
DE60301331D1 (en) | 2005-09-22 |
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